Term
| Define "noise" as it pertains to class |
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Definition
| An unwanted signal characteristic (random electrical waves) of all electronic circuits |
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Term
| How is noise introduced into a circuit? |
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Definition
| It is already inherent, but can also be introduced by lightning, electric motors, electric power lines, circuit shorts, and bad design. |
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Term
| How can noise be reduced? |
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Definition
| By better design and filters |
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Term
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Definition
| a device (electric or electronic) that converts one form of energy (physical property) to another (electrical energy) for measurement or information transfer |
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Term
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Definition
| An increase in signal power, voltage, or current by an amplifier, expressed as the ratio of output to input. |
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Term
| What else could "amplification" be called in electronics? |
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Definition
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Term
| What is the dimensionless ratio of amplifaction? |
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Definition
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Term
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Definition
| remove unwanted frequency components from the signal, to enhance wanted ones, or both. |
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Term
| __________ filters utilize resistors, capacitors and inductors to operate. __________ filters use computer code. |
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Definition
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Term
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Definition
| a logarithmic unit that indicates the ratio of a physical quantity (usually power or intensity) relative to a specified or implied reference level. |
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Term
| What is the percentage of -3dB in voltage or current? |
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Definition
| 70.7% of the original signal value |
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Term
| What is the percentage of -3dB in power? |
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Definition
| 50% of the orignal signal value |
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Term
| What is a "High Pass Filter"? |
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Definition
| A filter that passes frequencies above a specified cut-off frequency |
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Term
| What is a "Low Pass Filter"? |
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Definition
| A filter that passes frequencies below a specified cut-off frequency |
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Term
| What is a "Band Pass Filter"? |
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Definition
| A filter that passes frequencies between two cut-off frequencies, but removes all other frequencies above and below the cut-off freqencies |
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Term
| What is a "Band Reject Filter"? |
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Definition
| A filter that passes frequencies below a cut-off frequency and above a second cut-off frequency but removes all frequencies in between |
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Term
| In functional filter operation, what is the "pass band"? |
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Definition
| frequencies retain 100% amplitude |
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Term
| In functional filter operation, what is the "transition band or roll-off"? |
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Definition
| freqeuncies reducing their ampltudes from 100% to -3dBΔ (slope) |
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Term
| In functional filter operation, what is the "stop band"? |
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Definition
| frequencies are essentially "turned off" because their amplitudes have been reduced to where they are unable to perform 'work' |
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Term
| When is a filter concidered "active"? |
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Definition
| When frequencies essentially have no ability to perform "work". This happens at the cut-off frequency which is where the transition band meets the stop band at a -3dBΔ |
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Term
| What is "functional cut-off frequency"? |
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Definition
| The point at which the frequency reaches a reduction of 3dB; a reduction to 70.7% of the signal's original current or voltage amplitude or 50% of the signal's original power amplitude |
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Term
| Why must roll-off be averaged? |
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Definition
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